/*
 * Copyright (C) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { IEngineKey, ImageKnifeOption, PixelMapTransformation,SparkMD5 ,ImageKnifeRequestSource,
  DownsampleStrategy} from '@ohos/libraryimageknife';

//全局自定义key demo
@Sendable
export class CustomEngineKeyImpl implements IEngineKey {
  // 生成内存缓存key
  generateMemoryKey(loadSrc: string | PixelMap | Resource, requestSource: ImageKnifeRequestSource,
    imageKnifeOption: ImageKnifeOption,isAnimator?: boolean, width?: number, height?: number): string {
    let key = ""
    if(imageKnifeOption.signature == "aaa" && typeof loadSrc == "string") {
      let num = loadSrc.indexOf("?")
      let src = loadSrc.substring(0,num)
      key = "loadSrc=" + src
    } else {
      key = (isAnimator == true ? "Animator=" : "loadSrc==") + (typeof loadSrc == "string" ? loadSrc : JSON.stringify(loadSrc)) + ";"
    }
    if (requestSource === ImageKnifeRequestSource.SRC) {
      if (imageKnifeOption.signature !== undefined && imageKnifeOption.signature !== "") {
        key += "signature=" + imageKnifeOption.signature + ";"
      }
      if (imageKnifeOption.dynamicRangeMode !== undefined && imageKnifeOption.dynamicRangeMode !== DynamicRangeMode.STANDARD) {
        key += 'dynamicRangeMode=' + imageKnifeOption.dynamicRangeMode + ';'
      }
      if (imageKnifeOption.transformation) {
        key += "transformation=" + this.getTransformation(imageKnifeOption.transformation) + ";"
      }
      if ((imageKnifeOption.downsampleOf !== DownsampleStrategy.NONE && imageKnifeOption.downsampleOf !== undefined)) {
        key += "downsampleOf" + imageKnifeOption.downsampleOf + "width=" + width + "height=" + height
      }
    }
    return key
  }

  // 生成文件缓存key
  generateFileKey(loadSrc: string | PixelMap | Resource, signature?: string,isAnimator?: boolean): string {
    let src = ""
    if(signature == "aaa" && typeof loadSrc == "string") {
      let num = loadSrc.indexOf("?")
      let key = loadSrc.substring(0,num)
      src = "loadSrc=" + key
    } else {
      src = (isAnimator == true ? "Animator=" : "loadSrc==") + (typeof loadSrc == "string" ? loadSrc : JSON.stringify(loadSrc)) + ";"
    }
    if (signature !== undefined && signature !== "") {
      src += "signature=" + signature + ";"
    }
    return SparkMD5.hashBinary(src)
  }

  private getTransformation(transformation: PixelMapTransformation): string {
    return transformation.getName()
  }
}